vogel



w MQ L) J. O. VOGEL.

Metal-Roofing;

N0. 242,082. Patented May 24, 1881-.

. subsequently in another direction, for the pur-' UNITED STATES PATENT OFFICE.

JOHN O. VOGEL, OF ROCHESTER, NEW YORK.

METAL ROOFING.

SPECIFICATION formingpart of Letters Patent No. 242,082, dated May 24, 1881.

Application filed March 26, 1881.

To all whom it mag "concern.-

Be it known that I, JOHN 0. VOGEL, of Rochester,in the county of Monroe and State of New York, have invented certain Improvements in MetalRoofin g, of which the followingisa specification.

The main object of this invention is to construct a sheet-metal roof in such manner as to avoid the opening or breaking of the joints or seams by the contraction of the metal; and to this end it consists informing the roof of plates of tin or other sheet metal, each having its entire surface corrugated, these sheets being seamed together or otherwise united at the edge in any ordinary or suitable manner, where by a roof is produced the seams of which are of greater length than the surface of the roof.

The invention also consists in the manner of preparing the corrugated sheets, consisting in first corrugating them in one direction and pose ofshortenin g the sheets both ways, so that in the process of making the scam the seam he'- comes wavy, and consequently of greaterlen gth than the body of sheet.

Referring to the accompanying drawings, Figure 1 represents a perspective view of the prepared sheet; Fig. 2, an edge view of the same; Fig. 3, a perspective view of a portion of a roof constructed of the improved plates.

In preparing the improved plates flat sheets of tin or other suitable material, such as are ordinarily used in the construction of sheetmetal roofs, are passed between corrugatingrolls or corrugating-machines, or device of any suitable construction, and corrugated throughout their entire surface in one direction. After this first corrugation the plates are again passed through the machine and corrugated in another and difl'erent direction, the plates heing in this manner shortened in two directions. It is preferred that the corrugation should run diagonally or obliquely across the sheets at substantially right'angles to each other; but their course maybe modified. After the sheets are corrugated the edges are formed for the purpose of uniting the sheets or making the seams. The operation of closing the seam has the effect of increasing the length of the edges (No model.)

appearance, and counteracts the effect of expansion and contraction of the seams, the corrugation in the body of the sheet acting in the same capacity for the central portion of each sheet.

The sheets, being constructed as above described, are laid in position and seamed together or otherwise united at their edges in any ordinary or suitable manner, the result being the production of a roof in which the joints are of greater length than the roof-surface, the joints or seams presenting a vertical, waved, or SlllllOllS appearance.

It'is found that the roof thus constructed is entirely free from the ordinary danger of rupture in the joints or seams when the metal is contracted by exposure to a low temperature.

In roofs of ordinary construction having flat scams or joints of the same length as the body of theplates, the contraction of the metal causes the joints to open or the metal to be ruptured; but in the improved form of root herein presen ted the contraction of the metal serves merely to take up the surplus length of the joints or seams and renderthem straight, or approximately so, without in the least straining the joints.

We are aware that roof-plates have been pro vided with central corrugations, and we make no claim, broadly, thereto, our invention being rugations, our invention is designed to embrace anyand all plates, whether corrugated or not, the edges of which are of greater length than the body of the plate.

Having thus described the invention, what is claimed is- 1.'The metal sheet for roofing purposes havin g the central corrugated portion and the flattened edges of alen gth greater than lines drawn parallel therewith through the middle of the sheet.

2. The sheet-metal roofing-plate having its entire surface corrugated in two directions for the purpose of shortening the same in both directions, whereby the formation of the seams 50 or seams and gives them a wavy or buckled in applying the plates will, in consequence of sheet-metalroof-plates,eonsistingin corrugut- 10 mg a plate first in one direction and then in another, and finally elongating the edges ofthe plate.

JOHN O. VOGEL.

Witnesses:

JOHN SIDDONS, F. S. ROGERS. 

